Barnes, J. G. (2001). Secrets of customer relationship management: It's all about how you make them feel (1a. ed.). McGraw-Hill.
Citace podle Chicago (17th ed.)Barnes, James G. Secrets of Customer Relationship Management: It's All About How You Make Them Feel. 1a. ed. Nueva York: McGraw-Hill, 2001.
Citace podle MLA (9th ed.)Barnes, James G. Secrets of Customer Relationship Management: It's All About How You Make Them Feel. 1a. ed. McGraw-Hill, 2001.
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